KR20100103995A - Hybrid type apparatus for heating hot water using heat-pump - Google Patents

Abstract

PURPOSE: A hybrid type hot water heating apparatus for a heat pump, which improve performance by supplementing a scarce evaporative heat source in a heat pump, is provided to stably perform the operation of a compressor by preventing the overload and overheat of a compressor. CONSTITUTION: A hybrid type hot water heating apparatus for a heat pump comprises a refrigerant pipe(10), a heat exchanger(20) and bypass lines(17,17a). The refrigerant pipe is expanded from a hot-water heater(7) in an expansion valve(8). The condensation refrigerant used for the heating of the hot water passes through the heat exchanger. One bypass line has a capillary tube(18) and is branched from the refrigerant pipe between the heat exchanger and the hot-water heater. The other bypass line is expanded from the heat exchanger.

Description

Hybrid type apparatus for heating hot water using heat-pump}

The present invention relates to a heat pump hot water device for heating the hot water by using a heat pump system while also using the cold air generated in the evaporator for cooling and cold water supply, if necessary, to condensation refrigerant before passing through the expansion valve. Evaporation heat source is replenished by recovering the heat contained in the heat exchanger.In the heat exchanger, the expanded refrigerant passes through the capillary tube of the bypass line to exchange heat with the condensation refrigerant and then is supplied to the compressor. The pressure on the inlet side should be lowered, which makes it possible to more efficiently replenish the insufficient evaporation heat source in the heat pump during the winter season, thereby contributing to the improvement of the performance of the heat pump hot water system, and to prevent overheating and overload of the compressor. Hybrid heat to ensure reliable operation It relates to a water loop device.

In general, in the residential spaces such as houses, or in the workplaces such as offices or factories, the cooling of the summer and the heating of the winter are emerging as the main factors for improving the living environment. Due to the increase of factory sites and offices, the demand for energy for cooling and heating is also increasing rapidly.

Compared to the increase in energy demand as described above, the supply of energy does not keep up with the demand due to the price increase of fossil fuels such as petroleum and natural gas and environmental pollution caused by the combustion of fossil fuels. In the fields of agriculture, livestock, and fisheries, managers of facility farms and aquaculture are under pressure to increase their cooling and heating costs due to the use of fossil fuels. There are many difficulties.

In order to overcome these factors, the use of heat generated and recovered during the compression, condensation, and evaporation cycles of refrigerants, to obtain energy equivalent to fossil fuels without generating pollution in recent years, The use of air conditioners that perform heating has become common, and among them, a hybrid type heat pump hot water device capable of simultaneously supplying hot water and cooling and heating is widely used.

However, even in the heat pump hot water device as described above, when the outdoor temperature is very low, such as winter, 0 ° C or less, the heat source that can maintain the evaporator of the heat pump at a temperature of 10 ~ 15 ° C lacks, so the compressor It is difficult to use the heat pump hot water equipment, such as the operation of the fuel cell is stopped. Therefore, the supplementary heat source of the heat pump of the heat pump is supplemented by separate heating by fossil fuel. It did not completely solve the problem of excessive pollution.

As described above, the lack of heat source for the evaporation part of the heat pump hot water device generated during the winter season is supplemented by solar heat, and the heat absorbed by the solar heat collector is stored in a latent heat storage material such as water. It is known that the evaporator is used as a heat source, but it is not possible to use at night, so it is difficult to secure a sufficient heat source of the evaporator of the heat pump water heater.

In order to make up for these drawbacks, it is known to use heat scattered in the atmosphere or on the ground as the evaporator heat source of the heat pump hot water system together with solar heat. The source is to be replenished, and at night, the evaporative heat source of the heat pump water heater is replenished by queue or geothermal heat.

However, even in the case of the heat pump water heater as described above, since the evaporation heat source such as solar heat, queue and geothermal heat is not achieved, the evaporation heat source cannot be organically applied. Efficient management has become difficult, and there is a problem in that the heat pump hot water device cannot be operated with high efficiency in a situation where it is difficult to secure an evaporation heat source such as at night, in rainy weather or in cloudy weather.

In addition, in order to secure the evaporative heat source during the winter season, it depends mainly on large-scale devices such as solar collectors and queue recoverers that are installed outdoors, and considering the investment cost for securing the evaporative heat source, In addition to the deterioration of economic feasibility, and in case of circumstances where it is difficult to install solar heat and queue recovery devices due to local conditions, there is no alternative for securing an evaporative heat source during the winter season.

The present invention has been made in order to solve the above-mentioned conventional problems, the hybrid type heat pump water heater according to the present invention, the condensation refrigerant heat exchange before supplying the condensed refrigerant to the expansion valve used for heating the hot water Pass through the air, and recover a portion of the condensation refrigerant from the previous position of the heat exchanger, and expand the condensation refrigerant as it enters the bypass line including the capillary tube. By performing heat exchange with the condensation refrigerant and supplying it to the inlet side of the compressor, the heat contained in the condensation refrigerant before the passage of the expansion valve to recover the heat of evaporation, while reducing the pressure of the compressor inlet side. It is a 1st technical subject to make it possible to prevent overheating and overload.

As a result, even in a situation where a device for recovering solar heat or a queue cannot be applied, the evaporation heat source insufficient during the winter season can be replenished more efficiently in the heat pump, thereby contributing to the improvement of the performance of the hot water pump. The second technical problem is to make it possible to operate the heat pump hot water device with high efficiency while minimizing the cost and space required for the installation of the device even when applying a device for recovering solar heat or a queue. .

In addition, the present invention by installing an auxiliary evaporator on the upper surface of the hot water tank together with the heat exchanger for recovering the heat of the condensation refrigerant, it is possible to additionally use the heat emitted from the hot water tank to the evaporation of the refrigerant, thereby The third technical task is to secure and supplement the evaporative heat source insufficient in the winter season more efficiently in the heat pump so as to further contribute to improving the performance of the heat pump hot water device.

Finally, according to the present invention, the solar collector for solar heat recovery is connected to the hot water tank by the heat storage tank, and the solar heat and queue recovery is performed by closely installing a queue recovery plate as an external evaporator on the lower side of the solar collector. The fourth technical task is to make the heat pump water heaters operate safely and accurately with high efficiency, even in extreme conditions such as winter nights.

The present invention as a means for solving the above technical problem, the compressor, the condenser, the expansion valve and the evaporator is provided with a heat pump device driver for connecting the refrigerant pipe is formed to form a circulation loop of the refrigerant, the device driver The condenser is a heat pump hot water device installed as a hot water heater inside or outside the hot water tank inserted into the insulating case, and the condensing refrigerant used for heating the hot water in the refrigerant pipe extending from the hot water heater (condenser) to the expansion valve. The heat exchanger is passed through, the bypass line having a capillary tube (expansion mechanism) is branched from the refrigerant pipe corresponding to the hot water heater and the heat exchanger, the bypass line is a supply pipe for the evaporative refrigerant through the capillary tube It is installed in connection with the heat exchanger, the heat exchanger from the heat exchanger to perform the heat exchange with the condensation refrigerant And a bypass line provided with a closing valve as the sheet discharge pipe extends, characterized in that the by-pass line connected to the refrigerant pipe, which is installed for the inlet side of the compressor.

In addition, the present invention is an internal evaporator is installed on the upper surface of the hot water tank, the internal evaporator is connected to the refrigerant pipe corresponding to the inlet side of the compressor by the branch pipe and the recovery pipe, the branch pipe is an on-off valve The recovery pipe is installed, characterized in that the one-way check valve is installed, the internal evaporator is installed in the upper surface of the hot water tank while the pipe in which the refrigerant flows to form a spiral coil (Coil) The evaporator of the apparatus driving unit for the heat pump may be installed outdoors by using a queue collector plate and a solar collector plate as a plate coil collector having a fincoil evaporator or a refrigerant passage, or the fincoil vaporizer and the queue collector plate and the solar collector plate. Sequentially installed in series so as to be installed outdoors in a state connected by a refrigerant pipe having an expansion valve. And that is characterized.

In addition, the present invention is the queue recovery plate having a refrigerant passage is installed outdoors as an external evaporator, a solar collector is installed on the upper surface of the queue recovery plate, the solar collector is a heat medium supply pipe and a heat medium having a circulation pump The heat storage tank is connected to the heat storage tank by a recovery pipe, and the heat storage tank is connected to the hot water tank by a cold water discharge pipe having a circulation pump and a hot water supply pipe, and the solar heat collector is a vacuum tube solar collector. It is characterized by.

According to the present invention as described above, the heat contained in the condensation refrigerant prior to passing through the expansion valve to the primary heat recovery from the heat exchanger to the evaporative heat, while the refrigerant in the state of the pressure and temperature is adjusted inside the heat exchanger It is effective to supply the inlet side of the compressor along the bypass line. This prevents the compressor from malfunctioning or malfunctioning due to overheating or overload of the compressor. In addition, it has the effect of contributing to the improvement of the performance of the heat pump water heater.

In addition, when an internal evaporator is installed in addition to the heat exchanger to recover heat emitted from the hot water tank as evaporative heat, there is an effect of securing a sufficient amount of insufficient evaporation heat source in the heat pump itself during the winter season. Therefore, even when the outdoor evaporator can not be installed, it is effective to safely operate the heat pump hot water device more efficiently and prevent overload of the evaporator and failure or malfunction of the compressor.

In addition, the heat exchanger and the internal evaporator as well as the outdoor heat source such as solar heat and the queue can be secured as an additional evaporative heat source, and at the same time contribute to the aspect of improving the performance of the heat pump water heater in winter, By reducing the capacity and volume of the external evaporator installed outdoors, there is an effect to reduce the overall equipment cost of the heat pump water heater.

In particular, by arranging solar collectors, heat storage tanks and queue recovery plates as external evaporators, it is possible to more efficiently perform heating of hot water by solar heat and securing evaporation heat sources by heat medium during winter days and nights. Because of this, even in extreme conditions such as winter night when the outdoor temperature drops below zero, the heat pump hot water device has a very useful effect such as high efficiency and safe and accurate operation.

Hereinafter, a preferred embodiment of the present invention for achieving the above object will be described in detail with reference to the accompanying drawings, in order to facilitate the understanding of the present invention refrigerant pipes to be the main flow path of the refrigerant (10) ) Is shown in bold in comparison with other pipes, but this is merely a means for facilitating the classification of the pipes and does not limit the actual pipe size.

First, in the heat pump water heater 1 according to the present invention as in the embodiment shown in Figures 1 to 3, the compressor 6, the condenser (heat radiator), expansion valve 8 and the evaporator 9 is a refrigerant The heat pump device driver 3 is connected to the pipe 10 to form a circulation loop of refrigerant, and the condenser (heat radiator) of the device driver 3 is inserted into the heat insulation case 4. It is installed as a hot water heater (7) inside or outside the hot water tank (2).

FIG. 1 shows a first embodiment in which the apparatus driving unit 3 is integrated in a driving unit case 5 which is integrally installed with the insulating case 4 at an upper portion of the insulating case 4. 2 shows a second embodiment in which the driving unit case 5 in which the device driving unit 3 is integrated is installed separately from the heat insulation case 4, which is equipped with the heat pump water heater 1 of the present invention. It is just a matter of choosing according to the conditions of the indoor space.

For example, when the ceiling of the indoor space where the heat pump water heater 1 is installed is high, the first embodiment may be applied, and when the ceiling of the indoor space is low, the second embodiment may be applied. Bars, the overall structure of the heat pump water heater 1 constituting each embodiment is substantially the same.

In addition, the driving unit case 5 is provided with a flow hole 5a or an opening of air for operating the cooling fan 9a installed together with the evaporator 9, and the cooling fan 9a is an evaporator ( Cool air formed in the periphery of 9) is discharged to the outside of the drive case 5 to maintain the ambient temperature of the evaporator 9 at a temperature necessary for evaporation of the coolant and to blow cool air to a place where cooling is required. Will be in charge of

In addition, on one side (left side of the drawing) of the hot water tank 2 inserted into the heat insulation case 4, the hot water supply pipe 2b and the inlet pipe 2a of the supplemental water (normal temperature water) are upper, By being connected to the lower side, the supplemental water introduced into the hot water tank (2) can be heated with hot water and supplied to the hot water supply pipe (2b) whenever necessary, so that it is possible to supply the hot water required for living or to perform winter heating. do.

As described above, the supply of supplemental water through the inlet pipe 2a and the supply of hot water through the hot water supply pipe 2b are most preferably controlled automatically in accordance with the purpose of using hot water or heating. Various valve mechanisms and circulation pumps may be installed in the inlet pipe 2a and the hot water supply pipe 2b. The hot water tank 2 may have a water level level sensor, and the like. It is a matter of course that the direct connection with the pipe or the free fall method by the water tank can be applied.

In addition, the hot water heater 7 for heating the replenishment water stored in the hot water tank 2 to the hot water may be installed inside or outside the hot water tank 2, the hot water heater 7 ) Is inserted into the hot water tank (2) to be inserted into the hot water tank (2) rather than wound around the hot water tank (2) in terms of improving the heating performance of the hot water.

When the hot water heater 7 is installed in the hot water tank 2 as an insertion type as described above, the hot water in the state in which the support frame 7a is fixedly installed in the vertical direction on both inner walls of the hot water tank 2, Most preferably, the heater 7 is connected to the support frame 7a while forming a coil, and the hot water heater 7 is a metal pipe having excellent corrosion resistance and thermal conductivity, for example. It is preferable to manufacture by copper pipe.

The hot water heater 7 is connected to the refrigerant pipe 10 extending through the heat insulating case 4 from the discharge side of the compressor 6, the refrigerant gas of the high temperature and high pressure discharged from the compressor 6 (hot Gas) flows to heat the hot water, and the refrigerant condensed by heating the hot water extends upward along the wall of the heat insulation case 4 from the lower side of the hot water heater 7. It is supplied to the evaporator 9 side of the drive unit 3 via.

In addition, the device driver 3 includes a receiver tank 12 and a dry filter for accommodating the condensation refrigerant supplied through the hot water heater 7 as a component of an additional known component for improving the performance of the heat pump. (Dry filter) 13 is installed in the previous position of the expansion valve (8), while the liquid separator (14) is installed on the inlet side of the compressor (6), the pressure gauge (11) for the automatic control of the device drive unit (3) And a controller 15 are provided respectively.

Instead of the liquid separator 14, it is also possible to install and use an accumulator (accumulator) in which an automatic control of pressure and flow rate is added, and a vibration absorber for reducing noise and vibration on the discharge side and the suction side of the compressor (6). Various known parts for improving the performance of the heat pump are provided under the condition that the compressor 6, the hot water heater 7, and the expansion valve 8 and the evaporator 9 are included. Of course, it can be included in (3).

In addition, the pressure gauge 11 displays the discharge side pressure of the compressor 6 sensed through the pressure gauge connecting pipe 16 to the outside, and serves to transmit a corresponding signal to the controller 15. The controller 15 calculates and processes a condition input from the pressure gauge 11 and a control condition preset by the user, and controls the operation of the compressor 6 and the various valve mechanisms included in the device driver 3. Will be in charge.

As a component corresponding to the first essential part of the present invention, a heat exchanger is connected to the refrigerant pipe 10 extending from the hot water heater 7 to the expansion valve 8 through the receiver 12 and the dry filter 13. (20) to allow the condensation refrigerant used for heating the hot water to pass through the heat exchanger (20), and from the refrigerant pipe (10) corresponding to the dry filter (13) and the heat exchanger (20). Bypass line 17 having a capillary tube 18 is to be branched.

The bypass line 17 branched as described above is connected to the heat exchanger 20 so as to be a supply pipe of the evaporative refrigerant linearly expanded through the capillary tube 18, and the heat exchanger with the condensation refrigerant from the heat exchanger 20. The bypass line (17a) having the on-off valve (19) is extended as the discharge pipe of the evaporative refrigerant, the bypass line (17a) is a refrigerant pipe 10 corresponding to the inlet side of the compressor (6) That is, it is to be connected to the refrigerant pipe 10 corresponding to the transfer of the liquid separator (14).

The heat exchanger 20 is a condensation refrigerant supplied to the expansion valve (8) and the evaporative refrigerant linearly expanded through the capillary tube 18 of the bypass line 17 to recover a portion of the condensation refrigerant is not mixed with each other Any type of heat exchanger may be used as long as it can perform heat exchange, but most preferably, as the dozens of heat transfer plates are brought into close contact with each other by means of a gasket, the flow spaces of the condensation refrigerant and the evaporative refrigerant are spaced between each heat transfer plate. And a plate heat exchanger which is formed alternately.

The solenoid valve automatically controlled by the controller 15 is most preferable as the on-off valve 19 installed in the bypass line 17a, and the flow rate can be controlled instead of the capillary tube 18. Although the expansion valve 8 may be applied, the bypass line 17 is a subsidiary pipe for recovering a part of the condensation refrigerant from the refrigerant pipe 10 serving as the main pipe, and thus, it is sufficient to install the capillary pipe 18.

When the heat exchanger 20 is installed in the above manner, the refrigerant condensed in the hot water is passed through the heat exchanger 20 before being supplied to the expansion valve 8, and the bypass line 17 is provided. A portion of the condensation refrigerant introduced along) is linearly expanded through the capillary tube 18 and then passes through the heat exchanger 20 in the form of an evaporative refrigerant, whereby the condensation refrigerant and the evaporative refrigerant and Heat exchange is achieved.

Therefore, the heat contained in the condensation refrigerant prior to passing through the expansion valve (8) is to be recovered as the heat of evaporation from the heat exchanger (20), while the on / off valve (19) serving as an adjustment valve is used for the evaporation of the refrigerant. Not only the supply amount and the internal pressure of the compressor 6 can be adjusted, but also the heat recovery rate in the evaporator 9 can be further improved by adjusting the pressure and temperature of the evaporative refrigerant supplied through the expansion valve 8.

As a result, the evaporation heat source lacking during the winter season can be more efficiently replenished in the heat pump to contribute to the improvement of the performance of the heat pump hot water device 1, and the overheating and overload of the compressor 6 can be prevented. As the temperature of hot water rises, the condensation capacity and the sub-cooling decrease.

For example, about 85 ° C of refrigerant gas discharged from the compressor 6 heats hot water through a hot water heater 7 as a condenser, and then a liquid refrigerant having a temperature of about 45 ° C. Condensation refrigerant is supplied to the expansion valve (8) with a temperature of about 39 ° C. through the receiver (12) and the dry filter (13), and the condensation refrigerant is depressurized in the expansion valve (8). And vaporized to form an evaporative refrigerant having a temperature of about 8 ° C.

As the evaporative refrigerant having a reduced pressure and temperature passes through the evaporator 9 while passing through the expansion valve 8 as described above, the heat of the evaporator 9 is recovered and finally evaporated, and then the liquid separator 14 is removed. Through the recirculation loop of the reflow type into the compressor 6, the heat pump hot water device 1 can be operated with high efficiency as the amount of heat recovered from the evaporator 9 increases, that is, the evaporation efficiency of the refrigerant is high. Will be.

However, in winter, the ambient temperature of the place where the heat pump water heater 1 is installed is lowered, so that the evaporation heat source of the refrigerant that can be recovered from the evaporator 9 is insufficient, and thus the heat collecting efficiency of the evaporator 9 is reduced. As this decreases, the efficiency of the heat pump warm water device 1 also decreases, and the heat exchanger 20 may solve this problem in the heat pump itself.

In other words, a condensation refrigerant of about 40 ° C. supplied to the expansion valve 8 is introduced into the heat exchanger 20, while a part of the condensation refrigerant is recovered to the bypass line 17 and linearly expanded in the capillary tube 18. As a result, an evaporative refrigerant of about 8 ° C. is formed, and the evaporative refrigerant thus formed is introduced into the heat exchanger 20 to first recover heat contained in the condensation refrigerant as evaporative heat.

As described above, the refrigerant gas primarily evaporated from the heat exchanger 20 flows into the refrigerant pipe 10 along the bypass line 17a including the on / off valve 19, and then is supplied through the evaporator 9. It is re-supplied to the compressor (6) through the liquid separator 14 in a mixed state with the refrigerant gas, and only the remaining condensed refrigerant passing through the heat exchanger (20) is supplied to the evaporator (9) through the expansion valve (8). do.

As described above, the condensation refrigerant having passed through the heat exchanger 20 is not only lowered in temperature by about 25 ° C. due to the heat recovery process of the evaporative refrigerant generated in the heat exchanger 20, but also the overall flow rate of the bypass line. 17) is reduced by the amount of the escape, so that the reduced pressure and vaporized evaporative refrigerant through the expansion valve (8) has a temperature lower than the conventional 8 ℃.

As described above, when the evaporative refrigerant having a very low temperature through the expansion valve 8 is supplied to the compressor 6, the internal pressure of the compressor 6 is adjusted to an appropriate level, as well as by the compressor 6. It is possible to maintain a constant compression ratio, as a result of stabilizing the function of the compressor (6), as well as to improve the efficiency of the heat pump water heater (1).

The refrigerant gas evaporated through the evaporator 9 as described above is supplied to the compressor 6 along the refrigerant pipe 10, and in this process, the refrigerant gas discharged from the heat exchanger 20 through the bypass line 17a. It is finally mixed with, the heat pump hot water device 1 according to the present invention by the opening and closing valve 19 installed in the bypass line (17a) summer (evaporator alone) and winter (combination of evaporator and heat exchanger) It can be used separately.

As the components corresponding to the second main part of the present invention, as shown in Figs. 1 to 3, an internal evaporator 25 is provided on the upper surface of the hot water tank 2, and the internal evaporator 25 ) Is connected to the refrigerant pipe 10 corresponding to the inlet side of the compressor (6) by the branch pipe 21 and the recovery pipe 23, the branch pipe 21 is provided with an on-off valve 22 The recovery pipe 23 is provided with a one-way check valve 24.

The internal evaporator 25 recovers the heat dissipated from the hot water tank 2 to the internal space of the heat insulation case 4 and is used for evaporation of the refrigerant, so that the evaporation heat insufficient during the winter season together with the heat exchanger 20. As a function of ensuring a circle more sufficiently in the heat pump itself, any type of evaporator structure may be applied as long as it can be inserted between the hot water tank 2 and the heat insulation case 4.

However, most preferably, as shown in FIG. 4, the pipe in which the refrigerant flows is formed into a spiral coil, and then, the upper surface of the hot water tank 2 is covered with the internal evaporator 25. ) And the branch pipe 21 and the recovery pipe 23 serve to circulate the refrigerant gas supplied to the inlet side of the compressor 6 to the internal evaporator 25 side.

Since the internal evaporator 25 is installed separately from the heat exchanger 20 to additionally recover the evaporation heat source, the refrigerant gas discharged along the bypass line 17a via the heat exchanger 20 is the internal evaporator 25. Most preferably, the branch pipe 21 is located at a position ahead of the bypass line 17a based on the moving direction of the refrigerant, as shown in FIG. 3. It is connected with 10.

Like the on-off valve 22 provided on the branch pipe 21 and the on-off valve 19 provided on the bypass line 17a, it is possible to use a solenoid valve whose opening and closing are automatically controlled by the controller 15. Most preferably, the check valve 24 installed in the recovery pipe 23 blocks the phenomenon that the refrigerant gas recovering the heat emitted from the hot water tank 2 flows back to the internal evaporator 25.

When the internal evaporator 25 is additionally installed together with the heat exchanger 20 as described above, an insufficient evaporation heat source can be secured in the heat pump itself in the winter season, and thus an outdoor evaporator can be installed. Even when not present, the heat pump water heater 1 can be safely operated with high efficiency while preventing overload of the evaporator 9 and failure or malfunction of the compressor 6.

In addition, when the shutoff valve 10a is additionally installed in the refrigerant pipe 10 corresponding to the branch pipe 21 and the recovery pipe 23, the evaporator may be closed as necessary by closing the refrigerant pipe 10. The total amount of the evaporative refrigerant flowing through the compressor (6) to the compressor (6) can be guided to the internal evaporator 25, and the shut-off valve (10a) and each of the on-off valves (19) (22) and It is likewise most preferred to use solenoid valves.

As shown in FIG. 5, the heat pump water heater 1 according to the third embodiment of the present invention is mounted inside the driving unit case 5 and is disposed in the room together with the water heater 1. ) Is to be installed outdoors using the external evaporator 26, the rest of the configuration is the same as the first and second embodiments of the present invention, the driving unit case 5 is not installed in the drawing Although not shown, it is also possible to install the driving unit case 5 as necessary.

In the third embodiment of the present invention that can be applied to the external evaporator 26, as shown in FIG. 6, a pin coil evaporator 27 having a blowing fan 27a, or as shown in FIG. It may be a queue recovery plate 28 having a refrigerant passage (28a, 29a) and the solar heat collecting plate 29, as shown in Figure 8 and the pin coil evaporator 27 and the queue recovery plate 28 and The solar panels 29 may be sequentially arranged in series to be connected to the refrigerant pipe 10.

The finned coil evaporator 27 has a plate-shaped heat transfer fin attached to the outside of the pipe through which the evaporative refrigerant flowing through the expansion valve 8 flows, while using a blower fan 27a. Forcibly blown air in the air to the pipe side. Also called unit cooler, it is the most widely used product as evaporator in various heat pump devices.

When the pin coil evaporator 27 is applied to the external evaporator 26 as described above, as shown in FIG. 6, it is most preferable to apply the two-stage pin coil evaporator 27 in which two evaporators are arranged in series. In the first and second embodiments of the present invention, the evaporator 9, which has been disposed indoors together with the hot water device 1, may also be considered to use a pincoil evaporator 27.

In addition, the queue recovery plate 28 is a zigzag or multi-pipe arrangement of the refrigerant pipe on the surface of the aluminum (Al) plate having excellent heat absorption rate, the flow passage of the refrigerant 28a inside the aluminum (Al) plate It is a representative example of the zigzag or formed in a multi-pipe type, the solar heat recovery plate 29 to have the same structure as the queue recovery plate 28, by coating a black titanium paint on the upper surface The thing which made the absorption rate of solar heat increase is mentioned.

However, what has been described above is just a representative application of the queue recovery plate 28 and the solar recovery plate 29, in addition to other forms of heat recovery structure that can recover the queue and solar heat can be applied, of course, the applicant As described in the 10-2008-21149 refrigerant evaporation board and a refrigerant evaporator using the same, the queue recovery plate 28 and the solar heat recovery plate 29 are laminated in an aluminum case having a heat collecting glass plate as a cover. It may be to be inserted into the installation.

In addition, when the pin coil evaporator 27 and the queue recovery plate 28 and the solar heat collecting plate 29 are connected in series using the refrigerant pipe 10, the pin coil evaporator 27 extends from the pin coil evaporator 27. By additionally providing an expansion valve 8 on the refrigerant pipe 10, it is preferable to further improve the evaporation efficiency of the refrigerant in each evaporator.

In addition, although the pincoil evaporator 27 is installed in the preceding position as the first evaporator in the drawing, the pincoil evaporator 27 passes from the queue recovery plate 28 and the solar heat collecting plate 29 to the second evaporator. It can be installed, of course, two queue recovery plate 28 is shown in the drawing, but the number of the queue recovery plate 28 and the solar collector plate 29 also revealed that the manufacturer can change arbitrarily It is a bar.

According to the third embodiment of the present invention as described above, the heat exchanger 20 and the internal evaporator 25 to ensure sufficient evaporation heat source in the heat pump itself, as well as outdoor heat sources such as solar heat and queue In addition, since it can be secured as an additional evaporation heat source, it is possible to further contribute to the aspect of improving the performance of the heat pump water heater (1) in winter.

In addition, since the primary evaporation heat source can be secured by the heat exchanger 20 and the internal evaporator 25, even if the capacity and volume of the external evaporator 26 installed outdoors are reduced, the heat pump hot water device 1 ) Will be able to operate normally, thereby reducing the overall equipment cost of the heat pump hot water device (1) including an external evaporator (26).

9 and 10 show a heat pump hot water heater 1 according to a fourth embodiment of the present invention, a queue recovery plate 28 having a refrigerant passage 28a as the external evaporator 26 is shown. After the first installation, the solar collector 30 is installed on the upper surface of the queue recovery plate 28.

In addition, the solar collector 30 is connected to the heat storage tank 31 by the heat medium supply pipe 33 and the heat medium recovery pipe 34 having the circulation pump 32, the heat storage tank 31 is circulated It is to be connected to the hot water tank 2 by the cold water discharge pipe 35 and the hot water supply pipe 36 having a pump (32).

The solar collector 30 is a device for collecting energy contained in the sunlight and converting it into heat, as is generally applied to hot water and heating system using solar heat, the heat storage tank 31 is provided with a circulation pump (32) The heat medium line, that is, connected to the solar collector 30 by the heat medium supply pipe 33 and the heat medium recovery pipe 34, corresponds to an insulating tank for storing the heat medium heated by solar heat.

Typically, the solar collector 30 is a black titanium coated collector plate is inserted into a plate-shaped aluminum case, while a transparent cover layer (low iron tempered glass or plastic) through which sunlight is transmitted on the upper part of the aluminum case. ) Is covered with a cover, and a flat plate collector is used in which a heat insulating material is inserted between the titanium coated heat collecting plate and the aluminum case.

In the case of the solar collector 30 as described above, the sunlight passes through the transparent cover layer and hits the titanium-coated collector plate, and at the same time, the sunlight is converted into infrared rays, which pass through the transparent cover layer to the outside. Since the solar heat is accumulated in the solar collector 30, the internal temperature of the solar collector 30 is gradually increased.

In addition, a heat medium line connected to the heat medium supply pipe 33 and the heat medium recovery pipe 34 is inserted between the transparent cover layer of the solar collector 30 and the titanium coated heat collecting plate and arranged in a zigzag manner along the titanium coated heat collecting plate. The heat medium absorbs the solar heat accumulated in the solar heat collecting plate 30 in the process of circulating the heat medium along the heat medium line in the solar heat collector 30 by the circulation pump 32.

Therefore, the heat medium absorbing solar heat is circulated or temporarily stored in the heat storage tank 31, and thus, the heat storage tank 31 is formed from the hot water tank 2 along the low temperature water discharge pipe 35 having the circulation pump 32. Water supplied to the inside of the heat storage tank 31 is heated by performing heat exchange with the heat medium in the heat storage tank 31, so that the heated water can be supplied into the hot water tank 2 through the hot water supply pipe 36. do.

What has been described above corresponds to heating the hot water by using a heat pump and a solar collector 30 in the winter day, in the winter night in the state of stopping the operation of the circulation pump 32 installed in the low temperature water discharge pipe (35) As the heat medium stored in the heat storage tank 31 is circulated to the solar collector 30 side, the queue recovery plate 28 recovers the heat dissipated from the heat medium through the solar heat collector 30.

In addition, if necessary, the hot water stored in the hot water tank 2 is circulated to the heat storage tank 31 to heat the heat medium stored in the heat storage tank 31 during the winter night, while the heat medium heated as described above is heat-collected. By circulating to the side (30), the heat recovery plate 28 may recover the heat stored in the heat medium, the circulation operation of the hot water and the heat medium is achieved by the control of the circulation pump 32 using the controller 37 do.

Although the drawing shows that the hot water pipe and the heat medium pipe cross each other in the heat storage tank 31 to form a heat exchange structure 31a, as described above, the heat medium has a predetermined amount inside the heat storage tank 31. As long as it is stored as much as possible, it is most preferable that only the hot water pipe is arranged in a coil form inside the heat storage tank 31.

The heat storage tank 31 functions as an insulating tank, and also functions as an expansion tank that lowers the pressure of the heat medium, which is increased according to the absorption of solar heat, to a certain level. Most preferably, the heat medium may be a latent heat storage material such as water, or a liquid such as acetone or alcohol or methanol having a relatively low boiling point of 56.3 ° C.

In the fourth embodiment of the present invention, which can be most preferably applied to the solar collector 30, the vacuum tube solar collector 30 as shown in FIG. The collector 30 has a plurality of double pipe pipes 44 connected to the lower end of the heat storage case 40 serving as a head, and the solar heat recovered from each double pipe pipe 44 is stored in the heat storage case 40. It is to be delivered to the heat storage material 43, such as water.

The heat storage case 40 is covered with a heat insulating material 41 on its outer surface, while the heat medium pipe 42 is inserted as a heat medium line connected to the heat medium supply pipe 33 and the heat medium recovery pipe 34 therein. Accordingly, the heat medium stored in the heat storage tank 31 may perform heat exchange with the heat storage material 43 stored in the heat storage case 40 in the process of passing through the heat medium pipe 42, and the lower end of the heat storage case 40. The upper end of the double pipe pipe 44 is assembled to each of the joint portions 47 formed in the joints 47.

The double pipe pipe 44 has a vacuum portion 46 formed between the outer tube 44a and the inner tube 44b which are glass tubes, while the heat pipe 45 extending to the heat storage case 40 is formed in the inner tube 44b. It is installed to be inserted and supported, the inner wall 44a of the double pipe pipe 44 is coated with titanium paint, the inner pipe 44b of the double pipe pipe 44 is made to communicate with the heat storage case 40.

Therefore, the main heat collection function of the solar heat is achieved by each of the double pipe pipe 44, when the heat storage material 43 stored in the inner pipe 44a by the heat recovered through the double pipe pipe 44, the heat storage case ( The heat storage material 43 stored in the heat storage material 43 and the heat storage material 43 stored in the inner tube 44b are circulated and replaced with each other by convection, so that the high temperature heat storage material 43 is stored in the heat storage case 40. .

In addition, the heat pipe 45 serves as a circulation passage between the heat storage material 43 stored in the heat storage case 40 and the heat storage material 43 stored in the inner pipe 44b, and the heat pipe recovered from the inner pipe 44b. As a function of conducting the heat to the heat storage case 40 more quickly, the vacuum tube solar collector 30 has a heating temperature of the heat storage member 43 to a level of 90 ° C. or higher than a conventional flat collector. It is a product that can be improved.

11 shows only a representative embodiment of the vacuum tube solar collector 30 that can be applied to the present invention. In addition, other types of vacuum tube solar collectors may be arbitrarily selected according to the required purpose. Not only can it be applied, but the heat medium stored in the heat storage tank 31 and the heat storage material 43 of the vacuum tube-type solar collector 30 can be a homogeneous medium or a heterogeneous medium.

According to the fourth embodiment of the present invention as described above, the solar collector 30, the heat storage tank 31, and the queue recovery plate 28 are organically arranged to heat and heat the hot water by solar heat during the winter day and night. It is possible to more efficiently secure the evaporation heat source by this, which allows the heat pump water heater 1 to be operated safely and accurately with high efficiency even under extreme conditions such as winter night when the outdoor temperature drops below zero. will be.

What has been described so far is based on the best embodiment to facilitate the understanding of the present invention, the present invention is not limited to only the best embodiment, the scope of the technical idea that the present invention is to pursue It is apparent to those skilled in the art that various modifications and changes can be made based on the illustrated structure without departing from the scope of the invention, and it is to be understood that the invention should be evaluated only by the technical content set forth in the appended claims.

1 is an installation state of the hybrid type heat pump water heater according to the first embodiment of the present invention.

Figure 2 is an installation state of the hybrid type heat pump water heater according to the second embodiment of the present invention.

3 is a piping diagram incorporating the first and second embodiments of the present invention.

Figure 4 is a plan view of the internal evaporator applied to the present invention.

Figure 5 is an installation state of the hybrid type heat pump hot water device according to a third embodiment of the present invention.

6 to 8 are piping views showing the third embodiment of the present invention for each type of external evaporator.

9 is an installation state of the hybrid type heat pump hot water device according to a fourth embodiment of the present invention.

10 is a piping diagram showing a fourth embodiment of the present invention.

11 is a plan sectional view showing a vacuum tube solar collector applied to a fourth embodiment of the present invention.

Description of the Related Art

1: heat pump hot water device 2: hot water tank 2a: inlet pipe

2b: hot water supply pipe 3: device driving unit 4: heat insulation case

5 driving unit case 5a flow hole 6 compressor

7: hot water heater 7a: support frame 8: expansion valve

9 evaporator 9a cooling fan 10 refrigerant piping

10a: shut-off valve 11: pressure gauge 12: receiver

13 dry filter 14 liquid separator 15,37 controller

16 pressure gauge connector 17, 17a bypass line 18 capillary tube

19,22: on-off valve 20: heat exchanger 21: branch pipe

23 recovery pipe 24 check valve 25 internal evaporator

26: external evaporator 27: pin coil evaporator 27a: blowing fan

28: queue recovery plate 28a, 29a: refrigerant passage 29: solar heat collecting plate

30: solar collector 31: heat storage tank 31a: heat exchange structure

32: circulation pump 33: heat medium supply pipe 34: heat medium recovery pipe

35: low temperature water discharge pipe 36: hot water supply pipe 40: heat storage case

41: heat insulating material 42: heat pipe 43: heat storage material

44: double tube pipe 44a: appearance 44b: inner tube

45: heat pipe 46: vacuum portion 47: joint portion

Claims (7)

A compressor 6, a condenser, an expansion valve 8, and an evaporator 9 are connected to the refrigerant pipe 10 to provide a heat pump device driver 3 for forming a circulation loop of the refrigerant. In the condenser of (3) in the heat pump hot water device (1) installed as a hot water heater (7) inside or outside the hot water tank (2) inserted into the heat insulating case (4), The refrigerant pipe 10 extending from the hot water heater 7 to the expansion valve 8 is provided with a heat exchanger 20 through which the condensation refrigerant used for heating the hot water passes. The bypass line 17 having the capillary tube 18 branches from the refrigerant pipe 10 corresponding to the hot water heater 7 and the heat exchanger 20, and the bypass line 17 is a capillary tube. It is connected to the heat exchanger 20 as a supply pipe of the evaporative refrigerant passed through (18), From the heat exchanger 20, a bypass line 17a having an on-off valve 19 is formed as an outlet pipe of the evaporative refrigerant that has undergone heat exchange with the condensation refrigerant, and the bypass line 17a is a compressor ( Hybrid type heat pump hot water device, characterized in that connected to the refrigerant pipe (10) corresponding to the inlet side of 6). According to claim 1, wherein the internal evaporator 25 is installed on the upper surface of the hot water tank (2), the internal evaporator 25 of the compressor (6) by the branch pipe 21 and the recovery pipe (23) It is installed in connection with the refrigerant pipe 10 corresponding to the inflow side, A hybrid heat pump hot water device, characterized in that the branch pipe (21) is provided with an on-off valve (22), the recovery pipe (23) is provided with a one-way check valve (24). According to claim 2, The internal evaporator (25) is a hybrid heat pump hot water device, characterized in that the pipe in which the refrigerant flow is formed on the upper surface of the hot water tank (2) while forming a spiral coil. The evaporator 9 of the heat pump apparatus driver 3 is an external evaporator 26 which is installed outdoors. The external evaporator (26) is a hybrid heat pump hot water device, characterized in that the fin coil evaporator (27) or the refrigerant passage (28a, 29a) having a heat recovery plate 28 and the solar heat collecting plate (29). According to claim 4, The external evaporator 26 is composed of a pincoil evaporator 27, the queue recovery plate 28 and the solar heat collecting plate 29 are sequentially arranged in series connected to the refrigerant pipe (10), Hybrid heat pump hot water device, characterized in that the expansion valve (8) is additionally installed in the refrigerant pipe (10) extending through the pin coil evaporator (27) to the queue recovery plate (28). The method of claim 4, wherein the external evaporator 26 is a queue recovery plate 28 having a refrigerant passage 28a, the solar collector 30 is installed on the upper surface of the queue recovery plate 28, The solar collector 30 is connected to the heat storage tank 31 by a heat medium supply pipe 33 having a circulation pump 32 and a heat medium recovery pipe 34, and the heat storage tank 31 is a circulation pump 32. Hybrid type heat pump hot water device, characterized in that connected to the hot water tank (2) by the cold water discharge pipe 35 and hot water supply pipe (36) having a). The hybrid heat pump hot water device according to claim 6, wherein the solar collector (30) is a vacuum tube solar collector.

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